update SDL_mixer to SDL3_mixer 3.2.0

libs/SDL3_mixer/cmake/CPackProjectConfig.cmake.in

@@ -0,0 +1,37 @@
+if(CPACK_PACKAGE_FILE_NAME MATCHES ".*-src$")
+    message(FATAL_ERROR "Creating source archives is not supported.")
+endif()
+
+set(PROJECT_NAME "@PROJECT_NAME@")
+set(PROJECT_VERSION "@PROJECT_VERSION@")
+set(PROJECT_SOURCE_DIR "@PROJECT_SOURCE_DIR@")
+set(SDL_CMAKE_PLATFORM "@SDL_CMAKE_PLATFORM@")
+set(SDL_CPU_NAMES "@SDL_CPU_NAMES@")
+list(SORT SDL_CPU_NAMES)
+
+string(TOLOWER "${SDL_CMAKE_PLATFORM}" SDL_CMAKE_PLATFORM)
+string(TOLOWER "${SDL_CPU_NAMES}" SDL_CPU_NAMES)
+if(lower_sdl_cmake_platform STREQUAL lower_sdl_cpu_names)
+    set(SDL_CPU_NAMES_WITH_DASHES)
+endif()
+
+string(REPLACE ";" "-" SDL_CPU_NAMES_WITH_DASHES "${SDL_CPU_NAMES}")
+if(SDL_CPU_NAMES_WITH_DASHES)
+    set(SDL_CPU_NAMES_WITH_DASHES "-${SDL_CPU_NAMES_WITH_DASHES}")
+endif()
+
+set(MSVC @MSVC@)
+set(MINGW @MINGW@)
+if(MSVC)
+    set(SDL_CMAKE_PLATFORM "${SDL_CMAKE_PLATFORM}-VC")
+elseif(MINGW)
+    set(SDL_CMAKE_PLATFORM "${SDL_CMAKE_PLATFORM}-mingw")
+endif()
+
+set(CPACK_PACKAGE_FILE_NAME "${PROJECT_NAME}-${PROJECT_VERSION}-${SDL_CMAKE_PLATFORM}${SDL_CPU_NAMES_WITH_DASHES}")
+
+if(CPACK_GENERATOR STREQUAL "DragNDrop")
+    set(CPACK_DMG_VOLUME_NAME "@PROJECT_NAME@ @PROJECT_VERSION@")
+    # FIXME: use pre-built/create .DS_Store through AppleScript (CPACK_DMG_DS_STORE/CPACK_DMG_DS_STORE_SETUP_SCRIPT)
+    set(CPACK_DMG_DS_STORE "${PROJECT_SOURCE_DIR}/Xcode/SDL/pkg-support/resources/SDL_DS_Store")
+endif()